Battery-grid.



UNITED STATES hunted June 2o, 1905i- PATENT OFFICE.

.HENRY C. PORTER` OF IVAUKEGAN, ILLINOIS. ASSIGNORJTO EVANSVILLE BATTERY& ELECTRIC COMPANY, OF EVANSVILLE, INDIANA, A COR- PORATION f OFINDIANA.

BATTE RY-GRID- SPECIFICATION forming part of Letters Patent No. 792,813,dated June 20, 1905.

Application Sled August 19. 1904. Serial No. 221,369.

To fL/Z who/:vit may concern:

Be it known that I, HENRY C. PORTER, a citizen of the United States,residing at 'Waukeo'an, in the county otLake and Stateof 5 Illinois,have invented certain new and useful Im rovenients in Battery-Grids,ofwhich the fol owing is a specification.

My invention relates` to that particular type oi electrical secondary orstorage hatlo tery plates,'which are designated as Faure orpasted-plate'l type, in which a lead oxid or some other similar mediumis employed as an active material in connect-ion Wit-h the grid. In thistype of storage batteries to x5 which my invention relates a grid ofmet-allic lead is employed to which the lead oxid or other materialdesigned to be used as the active material applied. In storage batteriesof this type nnte-.h difficulty is encounzo tercd in providing ineansfor holding the ac:

tive material in proper position and in intimate Contact with the grid.li'iien the electrodc with this applied material is subjected to theinfluence of the electric current, the 2'5 metallic or support issubjected to a strain which frequently causes Warpin or bucklirg. Theaction of the electro ytic fluid on thc active material tends todisintegrate it, and unless the grid is constructed so as tosecurcly'retain it in place some of the active material will separatefrom the main body and accumulate at the bottom ofthe cell. This will'tend to cause shcrt-circuiting and will also serve to still further warpthe grid.V This.- Warping of the grid will also cause the dislocation ofmore active material, the accumulation of which at the bottom of thecell will increase the danger from shortcircuiting and greatl)v shortenthe life of the 40 grid, besldes destroying Athe etliciency of t'hdelectrode. f t

In order to obtain the most desirable results and attain the greatestefficiency for the battery, it is essential that While the activematerial or material to become active must he securelyA retains-d on thegrid free and open places must be provi-ded through which theelectrolytic iiuidmay iind free circulation to attack and act upri theactive material. f

My invention has for one object the proyision of means whereby theactive material or material to become active shall be firmly secured andheld against dislodgment in the electrode under the influence of thecharge and discharge of the electromotive force. A further object of myinvention is to providel mea ns for the free circulation and penetrationof the electrolyte in and around the outer and s ubjacent exposedsurfaces of the material.

A further object of invention is the prevention of the buckling of theplate, with a consequent loss of @Feet-*emotive force.

.These and such other objects as may hereinater appear are attained bythe devices shownv in the accompanying drawings, in

Which- Figure l is an elevation of a 'd of my imroved t3 e. F 2 is avertical section of i 1 on t e line 2 2 lookin in the directionindicated by the arrows. ig.,3 is a *."iew of one corner of the plate.

Referrin .by letter to the accompanying drawings, represents the body ofthe grid which constitutes the support for the active material. Thisgrid, which is shown as constructed with solid edges B, is made up of aseries of interior lon `tudinal bars C, which, while they may be oigsinydesired shape without departing from the spirit of my invention, are4here sllow'n as triangular. These bars are integrally attached to aback plate D, in which arel provided a plurality of openings E. Theseopenings may be formed when the plate is cast; ut I prefer to have theplateperforated after casting in such a wa'y that tanga F are formed onthe inner side of the back plate. By this method of construction Iprovide a grid with a solid hack late which will so stlien the grid asto 'reuce the danger of Warpin to a. minimum. The uliar construction othe bars in connection with the inwardly-projecting tanga allows a la eamount of active material or material to me active to be securelyretained in place andatthe same time provides h@ necesearily free accessof the electrolytic uid.

. While I have illustrated one form of my invention, it isv evident thatother constructions are possible Without departing from the spirit of mylnvention.

AIO

1. A metallic battery-plate comprising a back plate provided on one facethereof with integral metallic bars arranged to form pockets 'or theretention of active material, said bacl; plate being perforated at theback of said pockets.

2. Ametallic batterylate comprising end bars, a series of lonnfitu inalbars of triangular cross-section and a perforated back plat-e.

3, A metallic battery plate or grid comprising a hack late provided onone face zo with integral en bars and with integral longitudinal bars oftriangular cross-section arrarwed with the narrow edge adjacent tothebacli plate, to form pockets for active material, said back plate beingperforated between said bars. f

4. A battery-plate comprising end bars, a

series of longitudinal bars, a perforated back plate, andinwardly-projectinsf,r tangs.

A batterylate comprislng end bars, a series of lono'itu inal barsintegral therewith,

a perforated, back plate integral thereto,f andv I F. DRURY, p O. R.BARNETT.

